期刊
BIORESOURCE TECHNOLOGY
卷 170, 期 -, 页码 583-586出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.08.076
关键词
Kraft lignin; Hydrothermal treatment; Oil; Value-added products; Mechanism
资金
- National Natural Science Foundation of PRChina [21166011]
- Open Research Foundation of Key Laboratory for Solid Waste Management and Emergency Response of Ministry of Education of Tsinghua University [SWMES 2013-04]
The aim of this study is to explore hydrothermal conversion of kraft lignin for value-added products. With ranging between 5.4% and 10.6%, total oil yield decreased with the increase of temperature (130, 180, and 230 degrees C), the longer reaction time (15-60 min) led to increased total oil yield. Main compound of oils characterized by GC-MS was guaiacol (2-methoxy phenol) in the range of 19-78% of oil depending on different reaction conditions. Residual kraft lignins were characterized by GPC and FTIR with respect to the conversion mechanism of kraft lignin by this process. The conversion of kraft lignin under hydrothermal conditions had something to do with the degradation of beta-O-4 linkages, hydroxyl groups, carbonyl groups, aromatic rings resulting in the increased amount of phenolic OH groups in kraft lignin. (C) 2014 Elsevier Ltd. All rights reserved.
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